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F3110_F863_X2_310 • 1/25/2018

9

Film Capacitors – AC Line EMI Suppression and RC Networks

F863 Metallized Polypropylene Film for Harsh Environmental Conditions, Class X2, 310 VAC (Automotive Grade)

Soldering Process cont'd

Wave Soldering Recommendations cont'd

1.Thetableindicatesthemaximumset-uptemperatureofthesolderingprocess

Figure 1

Dielectric

Film Material

Maximum Preheat

Temperature

Maximum

Peak Soldering

Temperature

Capacitor

Pitch

≤10mm

Capacitor

Pitch

= 15 mm

Capacitor

Pitch

> 15 mm

Capacitor

Pitch

≤15mm

Capacitor

Pitch

> 15 mm

Polyester

130°C

130°C

130°C

270°C

270°C

Polypropylene

100°C

110°C

130°C

260°C

270°C

Paper

130°C

130°C

140°C

270°C

270°C

Polyphenylene

Sulphide

150°C

150°C

160°C

270°C

270°C

2. The maximum temperature measured inside the capacitor:

Setthetemperaturesothatinsidetheelementthemaximumtemperatureisbelowthelimit:

Dielectric Film Material

Maximum temperature

measured inside the element

Polyester

160°C

Polypropylene

110°C

Paper

160°C

Polyphenylene Sulphide

160°C

Temperature monitored inside the capacitor.

Selective Soldering Recommendations

Selectivedipsolderingisavariationofreflowsoldering.Inthismethod,theprintedcircuitboardwiththrough-hole

componentstobesolderedispreheatedandtransportedoverthesolderbathasinnormalflowsolderingwithouttouching

thesolder.Whentheboardisoverthebath,itisstoppedandpre-designedsolderpotsareliftedfromthebathwithmolten

solderonlyattheplacesoftheselectedcomponents,andpressedagainstthelowersurfaceoftheboardtosolderthe

components.

Thetemperatureprofileforselectivesolderingissimilartothedoublewaveflowsolderingoutlinedinthisdocument,

however, instead of two baths, there is only one bath with a time from 3 to 10 seconds. In selective soldering, the risk of

overheatingisgreaterthanindoublewaveflowsoldering,andgreatcaremustbetakensothatthepartsarenotoverheated.